IPv6 and Quality of Service (QoS)
IPv6 addresses another challenge that has recently faced the aging IPv4 infrastructure: the need for uniform Quality of Service (QoS) levels.
In the old days, when the Internet primarily was used for email and FTP-style downloads, no one thought much about prioritizing data transmission. If an email message didn’t arrive in 2 seconds, it would arrive in 2 minutes—or possibly in an hour. No one really cared about specifying or limiting the time interval in which the message could arrive. In contrast, today’s Internet supports many different types of transmissions, some with rigid delivery requirements. Internet video and television and other real-time applications cannot operate properly with long delays as packets ...
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